??????? ???????: ??? ???? ??? ?????? ?????? ?? ???? 1) ??????? ?? ?????? ??????? ?????? ??????? ????? ??? ??????? ?????? ????? ?????. 2) ?????? ??? ?????? ?????? ?? ??????? ???? ??? ?????? ????????? ????? ?????????. 3) ?????? ?????? ??? ???? ??????? ?????? ?? ???? ???????? ????? ?????? ????